What kind of dither fish could I add
If the BP and OB get along, I'd just leave them in there as the cichlids. Hard to get two cichlids to get along in a small tank, I think you've got lucky with the mix.
For dithers, here are some options:
Swordtails
Ameca splendens/goodeids
Flagfish
Tetras (Colombian, Buenos aires, etc any taller bodied tetra)
For bottom dwellers, large cory catfish would work or maybe zebra botias.




